Excluding None for a report

[#1]

Why is impossible to exclude the "none" value for all the reports from the admin, and we can exclude it from the graphs?

It will be great to do this.

[#2]

You can turn it off in the graphs by going to Favorites>>Report Settings and unchecking the box : Show "None," "Unspecified" and "Typed/Bookmarked" data in report graphs.

[#3]

I know how to turn it off for the graphs, the problem is that i can do that by default for the reports. So i am only turn it off a part of it.

[#4]

I know what 'None' means, but it just look very bad in the report.  I had to filter this value out everytime when I create dashboard. I wish there is a setting in the reporting interface that allows me to hide 'None' per report basis.